Industrial Refrigeration Maintenance of Float Valve

On a recent visit to a site in the South East, the industrial refrigeration maintenance of float valve was carried out. It was an easy job as the electronic part can be easily removed and replaced without breaking into the system. It works by detecting a level in the float chamber and operating the expansion valve solenoid coil

High Head Pressure

The call out had been to investigate a high head pressure issue. Our engineer arrived on site about 9 o clock and started to investigate the industrial refrigerationfault- a cup of coffee in hand. The machine started to load up and at around 70% it backed off with high lift warnings on the display. There was a low temperature drop on the liquid line between the float valve and the expansion valve- float valve failure. The float valve is stand alone as it will let anhydrous ammonia liquid through when it builds up- that is if it works of course

Industrial Refrigeration Maintenance of Electronic Parts

Slide Valve Sensor

A common kind of slide valve sensor on an industrial refrigeration system works by converting the length of the slide arm into 4-20mA. 4 being closed and 20 being open. To get it to work you have to set the minimum position on the slide arm with a lock nut- then set that to 0 in the program

Failed Slide Arm Electronics

A common fault is when the slide arm electronics fail, giving a stuck reading on the display. The chiller controls notice the abnormality and shut down the plant

Calibration

If the slide arm is okay, calibration can sort out the problem. In the program, the minimum and maximum positions can be set to ensure the smooth running of the plant, therefore maintenance can be kept to a minimum

Are you concerned with high maintenance costs and a tight budget? Maximus Chillers can relieve the stress- Click Here